Patient Data

B mode and Doppler ultrasound (2 days after the biopsy)

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B mode image of the transplanted kidney shows a hyperechoic linear image in the middle third of the kidney, corresponding to the site of the biopsy. Spectral Doppler tracing reveals a low resistance waveform with increased systolic and diastolic flow.

B mode and Doppler ultrasound (7 days after the biopsy)

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B mode image of the transplanted kidney shows an anechoic round structure image in the middle third of the kidney, corresponding to the site of the biopsy. Color Doppler images show focal color aliasing indicating high velocity at the arterio-venous fistula and surrounding blue and red speckles that indicate a “soft tissue bruit” caused by tissue vibrating. With increased color scale, the yin-yang sign, color flow pattern typical of pseudoaneurysm is present. The “soft tissue bruit” is no longer present.